Fuel cooler?
Fuel cooler? I have been watching Engine Masters, and I just saw the episode that shows that cooler fuel is better. With that in mind, would a fan powered cooler be beneficial if I am running two pumps?
I am thinking 900 GPH flow capacity
I am thinking 900 GPH flow capacity
Last edited by FCar2000TA; Jun 14, 2022 at 04:17 PM.
I think a couple other things have to be considered.
I have one because I run a return style set up and a relatively small (3.5 gal ) fuel cell.
The fuel coming back is fairly warm, and in such a small volume tank, I felt it may be an issue.
If I still had a 15 gal tank, not so much.
I have one because I run a return style set up and a relatively small (3.5 gal ) fuel cell.
The fuel coming back is fairly warm, and in such a small volume tank, I felt it may be an issue.
If I still had a 15 gal tank, not so much.
Here is the thread:
https://ls1tech.com/forums/fueling-injection/1941503-fuel-heating-caused-1-vs-2-pumps-test-results-inside.html
TECH Addict
Joined: Dec 2017
Posts: 2,201
Likes: 981
Why of course, pumps produce heat, and if you keep circulating the fuel through one/them, of course it'll eventually warm up. And also of course, adding a "cool can" will make the fuel denser. But with EFI, the ECM will just add a bit more fuel if it's less dense, and the O2 sensors tell it that it isn't reaching the target A/F ratio, so it's that much less critical anyway. Carbs of course couldn't be tuned that way, back in the day.
And don't forget also, higher temp fuel atomizes better, therefore burns better. There's more to it than just its density.
That's kinda not what you asked though. You asked if any improvement could be made to (I assume) YOUR car by cooling the fuel with a fuel-air cooler rig of some sort. Best way to know that is, see what the fuel temp is now, and compare to whatever lower temp you could possibly bring it to, with a free-air cooler like you propose. If it's only a ° or 2 above ambient to begin with, then there's not a whole lot of there there to go after.
And don't forget also, higher temp fuel atomizes better, therefore burns better. There's more to it than just its density.
That's kinda not what you asked though. You asked if any improvement could be made to (I assume) YOUR car by cooling the fuel with a fuel-air cooler rig of some sort. Best way to know that is, see what the fuel temp is now, and compare to whatever lower temp you could possibly bring it to, with a free-air cooler like you propose. If it's only a ° or 2 above ambient to begin with, then there's not a whole lot of there there to go after.
Why of course, pumps produce heat, and if you keep circulating the fuel through one/them, of course it'll eventually warm up. And also of course, adding a "cool can" will make the fuel denser. But with EFI, the ECM will just add a bit more fuel if it's less dense, and the O2 sensors tell it that it isn't reaching the target A/F ratio, so it's that much less critical anyway. Carbs of course couldn't be tuned that way, back in the day.
And don't forget also, higher temp fuel atomizes better, therefore burns better. There's more to it than just its density.
That's kinda not what you asked though. You asked if any improvement could be made to (I assume) YOUR car by cooling the fuel with a fuel-air cooler rig of some sort. Best way to know that is, see what the fuel temp is now, and compare to whatever lower temp you could possibly bring it to, with a free-air cooler like you propose. If it's only a ° or 2 above ambient to begin with, then there's not a whole lot of there there to go after.
And don't forget also, higher temp fuel atomizes better, therefore burns better. There's more to it than just its density.
That's kinda not what you asked though. You asked if any improvement could be made to (I assume) YOUR car by cooling the fuel with a fuel-air cooler rig of some sort. Best way to know that is, see what the fuel temp is now, and compare to whatever lower temp you could possibly bring it to, with a free-air cooler like you propose. If it's only a ° or 2 above ambient to begin with, then there's not a whole lot of there there to go after.
Trending Topics
So, 238 GPH
Last edited by FCar2000TA; Jun 15, 2022 at 07:13 PM.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'
Brett Foote
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
I was told years ago…never seen one myself…that BMW runs their fuel lines through an apparatus that, when the A/C is on, super cools the fuel lines. Is it true? No idea. Great idea though.
TECH Addict
Joined: Oct 2016
Posts: 2,513
Likes: 480
From: PDX-OR-USA
Don't know about fuel lines on the BMW but mine have had Water cooled power steering and a cooler loop for the alternator..
I suspect it would be the V8/V10 cars due to under hood heat on those or specific M models.
Cheers
I suspect it would be the V8/V10 cars due to under hood heat on those or specific M models.
Cheers
TECH Enthusiast
Joined: Sep 2019
Posts: 532
Likes: 630
Why? Well, two things. I have never seen such a system on a BMW, though my experience is slightly limited, and more significantly I have never heard anyone complaining that this mythical system broke or started leaking immediately after their warranty expired.
TECH Senior Member
Joined: Jun 2016
Posts: 22,301
Likes: 3,625
From: Central Cal.
I have confidence that BMW doesn't have such a system.
Why? Well, two things. I have never seen such a system on a BMW, though my experience is slightly limited, and more significantly I have never heard anyone complaining that this mythical system broke or started leaking immediately after their warranty expired.
Why? Well, two things. I have never seen such a system on a BMW, though my experience is slightly limited, and more significantly I have never heard anyone complaining that this mythical system broke or started leaking immediately after their warranty expired.
So I heard about this way back. I had a friend who had an ‘87 or ‘88 M5 and he told me that the car had this “fuel cooler” that worked by cooling the fuel lines utilizing a “manifold” or something like that. Apparently the fuel lines run through this, and when the A/C is on, the fuel is cooled. For the first time, I just now looked into this, and it’s a real thing. Apparently BMW and Mercedes tried this for a couple years. Over on the Bimmer forums, there’s lots of talk about this, but I didn’t spend enough time reading to see if it actually helped or not. My friend always talked about how “fast” his car was, but I never drove it or even rode with him. His driving left a “little bit to be desired” for me.
I must say, the idea is genius, however.
TECH Enthusiast
Joined: Sep 2019
Posts: 532
Likes: 630
No, your spot on there, for sure.
So I heard about this way back. I had a friend who had an ‘87 or ‘88 M5 and he told me that the car had this “fuel cooler” that worked by cooling the fuel lines utilizing a “manifold” or something like that. Apparently the fuel lines run through this, and when the A/C is on, the fuel is cooled. For the first time, I just now looked into this, and it’s a real thing. Apparently BMW and Mercedes tried this for a couple years. Over on the Bimmer forums, there’s lots of talk about this, but I didn’t spend enough time reading to see if it actually helped or not. My friend always talked about how “fast” his car was, but I never drove it or even rode with him. His driving left a “little bit to be desired” for me.
I must say, the idea is genius, however.
So I heard about this way back. I had a friend who had an ‘87 or ‘88 M5 and he told me that the car had this “fuel cooler” that worked by cooling the fuel lines utilizing a “manifold” or something like that. Apparently the fuel lines run through this, and when the A/C is on, the fuel is cooled. For the first time, I just now looked into this, and it’s a real thing. Apparently BMW and Mercedes tried this for a couple years. Over on the Bimmer forums, there’s lots of talk about this, but I didn’t spend enough time reading to see if it actually helped or not. My friend always talked about how “fast” his car was, but I never drove it or even rode with him. His driving left a “little bit to be desired” for me.
I must say, the idea is genius, however.
Find a good PWM power supply for your fuel system. Not generating excess heat is better than cooling it off. Remember Colin Chapman. Simplify, and add lightness.
TECH Senior Member
Joined: Jun 2016
Posts: 22,301
Likes: 3,625
From: Central Cal.
Not directly. You would have to power the PWM power supply, then use some sort of sensor to let it determine how hard to drive your fuel pump. This could be based on fuel pressure, boost pressure, rpm, afr, or phase of the moon. You decide.